Psoriasis is a common chronic benign dermatopathy that is often inherited and which is sometimes associated with insults of the joints and nails. It is generally characterized by symmetrical, clearly related red plaques covered by white thick scales, although there are several variants of the previous ones.

Psoriasis affects 1-2% of the population in Britain and North America, with equal frequency in both sexes. It is presented in all races, although less often in Blacks, Japanese and Indians of North America. 1/3 of the patients have a family history. probably inherited as a self-inflicted, dominant type with incomplete penetration. The disease can occur at any time from infancy to adulthood, although the initial period of adulthood and the end of the middle age is the most frequent age periods. It is one of the conditions that can manifest in spots of the skin where injury occurred (Koebner effect). Thus it is believed that psoriasis of the area covered by diapers is a possible manifestation of primary toxic dermatitis in an infant with a psoriatic predisposition.

Intense itching on the skin, injuries, burns and surgical incisions or very tight clothing can contribute to the onset of the disease.

Psoriasis, although it follows a chronic course, shows a strong periodic capacity. So at some stage can be very troublesome (eg in adolescence) and then be depressed or even disappear. It can be very limited in extent or extensive, many times it only affects an area like the scalp, hands, genital area or onyx without manifestations in other places. The condition may appear clinically stabilized and suddenly be switched to an acute stage. It is also possible to be presented with severe itching or not to have any subjective symptoms. So it is not enough only to diagnose, but must also be classified as to the type and location and on the basis of the precedents to choose the appropriate treatment.

• Common Psoriasis
• Subacute acute Psoriasis
• Erythrodermal Psoriasis
• Pustular Psoriasis
• Ductile Psoriasis
• Psoriatic arhtropathy

The psoriatic rash can occur at every point of the skin, but it is mainly located on the elbows, knees, torso, limbs where it can be recognized very easily. However, some traces may cause diagnostic confusion and may cause problems during treatment. Usually occurs in the scalp area, in the face, in the crease, in the hands and feet, in the genital area and in the fingernails.

Psoriasis, like any other chronic disease that is not offered for impressive therapeutic properties, requires excellent medical practice in its handling. It is important to take into consideration a number of factors concering the disease.